Nitro Bonded Directly To Benzene Ring Patents (Class 568/939)
  • Patent number: 10155719
    Abstract: A process for removing impurities from crude nitrated aromatic products obtained during the nitration of aromatic compounds. The nitrated aromatic products are purified by treatment with ammonia washing followed by caustic washing. The nitrophenolic-containing wash waters are treated to recover dissolved organics and ammonia, and the stripped ammonia-wash effluent is incinerated. Carbon dioxide, which can accumulate in the process, is purged to the caustic washer.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: December 18, 2018
    Assignee: NORAM INTERNATIONAL LIMITED
    Inventors: Steven D. Buchi, Alfred A. Guenkel
  • Patent number: 9738592
    Abstract: The present invention relates to a method for purifying raw dinitrotoluenes resulting from dinitration of toluene in the presence of a nitric acid/sulfuric acid/nitrating acid mixture, and a device or plant for performing the method, and a corresponding production plant for producing dinitrotoluene, characterized in that (a) the raw dinitrotoluenes are first subjected to a wash with at least one washing medium after separation of the nitrating acid mixture, followed by a separation of the washing medium; and that (b) subsequently the washed dinitrotoluenes resulting from method step (a) are subjected to stripping (stripping gas treatment) with at least one gas (stripping gas).
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: August 22, 2017
    Assignee: Josef Meissner GmbH & Co. KG
    Inventors: Jürgen Pöhlmann, Heinrich Hermann, Mirko Händel, Jürgen Gebauer, Tim Bergmann
  • Patent number: 9561998
    Abstract: A nitro compound represented by formula (1) which is a raw material for producing a compound represented by formula (7) can be produced by reacting at least one type selected from the group consisting of a compound represented by formula (2), a compound represented by formula (3), and a compound represented by formula (3?) with a compound represented by formula (4). [In the formula, R1, R2, R3, and R4 are each independently a hydrogen atom, etc., X1 and X2 are each independently a chlorine atom, etc., R6, R7, R8, and R9 are a hydrogen atom, etc., provided that X1, X2, R6, R7, R8, and R9 are not all the same, X3, X4, and X5 are a halogen atom, R10 is a nitro group, etc., R5 is an alkyl group having 1 to 12 carbon atoms, etc., and M is an alkali metal atom.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: February 7, 2017
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Yuya Yoshimoto, Tatsuya Toriumi, Yuta Nagashima
  • Patent number: 9409854
    Abstract: The present invention discloses an improved process for the liquid phase nitration of aromatic compounds catalyzed by WO3 supported on mesoporous silica support, at low temperature, with high conversion and selectivity.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: August 9, 2016
    Assignee: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
    Inventors: Shubhangi Bhalchandra Umbarkar, Mohan Keraba Dongare, Ankush Venkatrao Biradar, Atul Balasaheb Kulal, Trupti Vyankatesh Kotbagi, Ashvini Ramesh Bhosale, Macchindra Gulabrao Chandgude
  • Patent number: 9302978
    Abstract: The present invention relates to a continuously operated adiabatic process for the preparation of nitrobenzene by nitration of benzene with nitric acid and sulfuric acid, in which the dilute sulfuric acid obtained after the nitration has taken place and the crude nitrobenzene has been separated off from the aqueous phase is concentrated for the purpose of re-use in the nitration, and after its concentration, at least one minute before it comes into contact with fresh nitric acid again an oxidizing agent is added such that a concentration of the oxidizing agent of from 10 ppm to 5,000 ppm, based on the total weight of the concentrated sulfuric acid to be recycled into the nitration, is established.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: April 5, 2016
    Assignee: Covestro Deutschland AG
    Inventors: Antoni Mairata, Thomas Knauf
  • Patent number: 9284255
    Abstract: The invention relates to an adiabatic process for producing nitrobenzene by nitrating benzene with sulphuric acid mixtures and nitric acid mixtures using a stoichiometric excess of benzene and reusing non-reacted benzene, the content of the aliphatic organic compounds in the feed benzene being limited, by the targeted evacuation of aliphatic organic compounds to at least one step in the process, to a content of less than 1.5 mass-%, in relation to the total amount of feed benzene.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: March 15, 2016
    Assignee: Bayer MaterialScience AG
    Inventors: Thomas Knauf, Alexandre Racoes, Wolfgang Dohmen, Antoni Mairata
  • Patent number: 9284256
    Abstract: The present invention provides a continuous process for the production of nitrobenzene by nitration of benzene with mixtures of sulfuric and nitric acid using a stoichiometric excess of benzene, in which the content of aliphatic organic compounds in the feed benzene during the start-up period of the production plant is always maintained at less than 1.5 wt. %, based on the total mass of the feed benzene. This is achieved either by mixing the feed benzene comprising recycled unreacted benzene (recycled benzene) and benzene newly supplied to the reaction (fresh benzene) in appropriate quantitative ratios during the start-up period, depending on the purity of the two streams, or by completely omitting the recycling of unreacted benzene during the start-up period, i.e. the feed benzene consists only of benzene newly supplied to the reaction.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: March 15, 2016
    Assignee: Bayer MaterialScience AG
    Inventors: Thomas Knauf, Michael Merkel
  • Patent number: 9227909
    Abstract: The present invention relates to a method for producing nitrobenzene, in which the waste gas streams accruing in the process and containing benzene and (traces of) nitrobenzene, possibly low- and medium-boiling components, possibly non-condensable gases and possibly water, optionally after removal of nitrogen oxides, are scrubbed in an absorption column with nitrobenzene, which comprises only very small amounts (maximum 50 ppm) of benzene and is distributed by means of a liquid distributor at a rate of 50 to 200 drip points per square meter, preferably 60 to 120 drip points per square meter, wherein (i) a liquid stream containing benzene and nitrobenzene, possibly organic low- and medium-boiling components and additionally containing sulfuric acid if sulfuric acid is used as the scrubbing agent and (ii) waste gas depleted in benzene and possibly in organic low- and medium-boiling components are obtained.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: January 5, 2016
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Knauf, Jurgen Munnig, Joerg Schmiedler
  • Patent number: 9227929
    Abstract: A continuous flow process for sulfonating 1,2.diaminobenzene comprises introducing a sulfonation mixture into a microreactor inlet of a continuous flow microreactor to produce a flow of the sulfonation mixture through the continuous flow microreactor. The sulfonation mixture comprises 1,2 aminobenzene dissolved in a molar excess of sulfuric acid. The continuous flow microreactor comprises one or more individual fluidic modules each having various features with respect to channel width and thermal management. The process further comprises maintaining a reaction temperature of from about 150.230 deg C. in at least a portion of the individual fluidic modules while the sulfonation mixture flows from the microreactor inlet to the microreactor outlet. Thereupon, the sulfonation mixture is received from the microreactor outlet. Finally, a sulfonated reaction product is precipitated out of the sulfonation mixture received from the microreactor outlet. The sulfonated reaction product is 3,4.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: January 5, 2016
    Assignee: CORNING INCORPORATED
    Inventors: Marc Winter, Feixia Zhang
  • Patent number: 9139509
    Abstract: A method and apparatus for removing non-aromatic impurities from non-nitrated aromatic reactant in a nitration production process, in which process an aromatic reactant is nitrated (100) to produce a nitrated aromatic product using a molar excess of the aromatic reactant, and non-nitrated aromatic reactant is recovered (102) from the produced nitrated aromatic product and is recycled (104) for use in the nitration production process. A portion of the removed excess non-nitrated aromatic reactant is diverted (106) and subjected to nitration (108). The nitrated stream may be further processed by separating out the spent acids (110) and the non-aromatic impurities (116). These streams may be sent (114, 118) to a suitable location in the nitration production train.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: September 22, 2015
    Assignee: NORAM INTERNATIONAL LIMITED
    Inventors: Alfred A. Guenkel, Sergio Berretta
  • Patent number: 9012700
    Abstract: The invention relates to a method for producing nitrobenzene, in which crude nitrobenzene is first produced by nitrating benzene and said crude nitrobenzene is then washed in succession in at least one acid wash, in at least one alkaline wash and in at least one neutral wash, at least one additional wash with an aqueous solution of a potassium salt being interposed between the last alkaline wash and the first neutral wash.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: April 21, 2015
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Thomas Knauf, Michael Merkel
  • Publication number: 20150099906
    Abstract: The present invention relates to a method for producing nitrobenzene, in which the waste gas streams accruing in the process and containing benzene and (traces of) nitrobenzene, possibly low- and medium-boiling components, possibly non-condensable gases and possibly water, optionally after removal of nitrogen oxides, are scrubbed in an absorption column with nitrobenzene, which comprises only very small amounts (maximum 50 ppm) of benzene and is distributed by means of a liquid distributor at a rate of 50 to 200 drip points per square metre, preferably 60 to 120 drip points per square metre, wherein (i) a liquid stream containing benzene and nitrobenzene, possibly organic low- and medium-boiling components and additionally containing sulfuric acid if sulfuric acid is used as the scrubbing agent and (ii) waste gas depleted in benzene and possibly in organic low- and medium-boiling components are obtained.
    Type: Application
    Filed: October 4, 2013
    Publication date: April 9, 2015
    Inventors: Thomas Knauf, Jurgen Munnig, Joerg Schmiedler
  • Publication number: 20150073180
    Abstract: The invention relates to a method for producing nitrobenzene, in which crude nitrobenzene is first produced by nitrating benzene and said crude nitrobenzene is then washed in succession in at least one acid wash, in at least one alkaline wash and in at least one neutral wash, at least one additional wash with an aqueous solution of a potassium salt being interposed between the last alkaline wash and the first neutral wash.
    Type: Application
    Filed: August 29, 2012
    Publication date: March 12, 2015
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Thomas Knauf, Michael Merkel
  • Patent number: 8907144
    Abstract: A process for continuous adiabatic nitration of toluene to mononitrotoluene (MNT). The process yields a product quality of MNT that is comparable to that obtained by isothermal production. The process uses excess toluene, with the reaction rate being controlled to maintain a residual of 0.003-0.102 wt % nitric acid in the spent acid and an orange to red color of the spent acid. Further process conditions include re-concentrated sulfuric acid at 83 to 99 degrees C. with a concentration of sulfuric acid from 66 to 70.5 wt %. This is mixed with nitric acid to generate a mixed acid with 1.0 to 3.8 wt % nitric acid and toluene is added at a rate of 1.1 to 1.71 moles toluene/mole nitric acid. The reactants are mixed in a reactor with an overall average mixing intensity of 5.8 to 19 W/kg of contained solution.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: December 9, 2014
    Assignee: NORAM International Limited
    Inventor: Michael Gattrell
  • Publication number: 20140357905
    Abstract: The present invention relates to a process and a plant for the production, in particular the continuous production, of nitrobenzene by means of adiabatic nitration of benzene with nitric acid in the presence of sulfuric acid, in which, following the nitration, a multi-stage concentration of the sulfuric acid is carried out by means of heating at a pressure that is reduced as compared with ambient pressure, and wherein the heating takes place using the heat generated in the adiabatic nitration of benzene.
    Type: Application
    Filed: January 28, 2013
    Publication date: December 4, 2014
    Inventors: Bernd Pennemann, Juergen Munnig, Wulf Dietrich, Andreas Karl Rausch
  • Publication number: 20140332413
    Abstract: Derivatization of an elemental carbon surface is accomplished by exposing the carbon surface to an aprotic solvent containing a hydrazone molecule of formula (I) or the corresponding salt of formula (II) wherein R1 is an organic group, and R2 is an organic group or hydrogen and decomposing the hydrazone in the presence of elemental carbon to create a carbene moiety of formula (III): which attaches to the carbon surface. The attached groups may be redox active so that the derivatized carbon may be used in an electrochemical sensor.
    Type: Application
    Filed: December 21, 2012
    Publication date: November 13, 2014
    Inventors: Lynne Crawford, Nathan Lawrence, Timothy Jones
  • Publication number: 20140221703
    Abstract: The present invention relates to a method for removing impurities from nitrated crude products obtained during the nitration of nitratable aromatic compounds, after removal of the final nitrating acid, by treatment with a washing medium, and also to a plant or apparatus suitable for implementing this method. Further provided by the invention is a production plant for the nitration of nitratable aromatic compounds with subsequent purification of the nitrated products.
    Type: Application
    Filed: May 18, 2012
    Publication date: August 7, 2014
    Inventors: Jürgen Pöhlmann, Heinrich Hermann, Mirko Handel, Jürgen Gebauer
  • Patent number: 8692035
    Abstract: An adiabatic process for making mononitrobenzene by the nitration of benzene which minimizes the formation of nitrophenols and dinitrobenzene by-products. The process uses a mixed acid having less than 3 wt % nitric acid, 55 to 80 wt % sulfuric acid, and water. The initial temperature of the mixed acid is in the range of 60 to 96° C. The nitration reaction is complete in about 300 seconds and produces less than 1,200 ppm nitrophenols and less than about 80 ppm dinitrobenzene. The reaction can be carried out in a plug-flow or a stirred pot reactor, or a combination of such reactors.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: April 8, 2014
    Assignee: Noram International Limited
    Inventor: Sergio Berretta
  • Patent number: 8609873
    Abstract: The invention relates to a process for making HOF.RCN and using it to oxidise organic substrates in a quick and safe way. The process comprises passing diluted fluorine through a conduit and RCN in water through another conduit into a microreactor to form HOF.RCN and reacting this with an organic substrates.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: December 17, 2013
    Assignee: The Secretary of State for Defense in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Christopher Murray, Graham Sandford
  • Patent number: 8604256
    Abstract: A method for making mononitrobenzene using a plug flow reactor train. Benzene, nitric acid and sulfuric acid are introduced into the reactor and produced mononitrobenzene is removed at an outlet end. All of the benzene and at least part of the sulfuric acid are introduced at the inlet end of the reactor. A first portion of the nitric acid is introduced by a first nitric acid feed into the inlet end and a second portion of the nitric acid is introduced at one or more additional feeds that are spaced between the inlet end and the outlet end. The method results in reduced formation of by-product dinitrobenzene, improving the reaction yield of mononitrobenzene while avoiding the need for a distillation step.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: December 10, 2013
    Assignee: Noram International Limited
    Inventors: Sergio Berretta, David A. Boyd
  • Patent number: 8592637
    Abstract: The present invention relates to a process for continuously preparing a mononitrated organic compound, especially a process for preparing mononitrobenzene. The invention relates more particularly to an improved continuous adiabatic process for preparing nitrobenzene.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: November 26, 2013
    Assignee: BASF SE
    Inventors: Leo Denissen, Eckhard Stroefer, Jan-Dirk Arndt, Torsten Mattke, Kerstin Heinen, Julia Leschinski
  • Publication number: 20130204043
    Abstract: The present invention relates to a continuous process for the production of nitrobenzene by nitration of benzene with nitric acid or mixtures of nitric acid and sulfuric acid to give a crude nitrobenzene, washing of the crude nitrobenzene by means of at least one of each of an acid, alkaline and neutral washing, there being obtained a pre-purified nitrobenzene which, as well as containing nitrobenzene, at least contains also low boilers, optionally middle boilers as well as high boilers and salts, wherein the pre-purified nitrobenzene is purified further by separating off low boilers in a distillation apparatus by evaporation of the low boilers, and separation of nitrobenzene from the resulting further purified nitrobenzene in a distillation apparatus by partial evaporation of nitrobenzene, wherein pure nitrobenzene is removed from the distillation apparatus in gaseous form and is subsequently condensed, and wherein the non-evaporated portion of the further purified nitrobenzene is fed back into the washing a
    Type: Application
    Filed: July 26, 2011
    Publication date: August 8, 2013
    Applicant: Bayer Intellectual Property GmbH Creative Campus Monheim
    Inventors: Thomas Knauf, Michael Merkel, Andreas Karl Rausch, Peter Lehner, Jürgen Münnig
  • Publication number: 20130197268
    Abstract: The invention relates to a process for the continuous production of nitrobenzene by nitration of benzene with a mixture of nitric acid and sulfuric acid under adiabatic conditions, in which unreacted benzene is separated from the crude product obtained after phase separation before washing thereof, using the adiabatic heat of reaction.
    Type: Application
    Filed: July 26, 2011
    Publication date: August 1, 2013
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Thomas Knauf, Alexandre Racoes, Andreas Karl Rausch, Dietrich Wulf
  • Publication number: 20130150608
    Abstract: This invention is directed to an improvement in the process for the production of alkylaromatic compounds that results in lower levels of residual unreacted materials in the final product. This invention comprises: 1) alkylation of an aromatic compound with an alkylating agent and a catalyst to produce an effluent stream comprising an alkylaromatic compound and unreacted materials; 2) heating the effluent stream; 3) stripping the effluent stream in a stripping device in the presence of steam; 4) separating a stripping stream from the stripping device, the stripping stream rich in unreacted materials; and 5) separating a product stream from the stripping device, the product stream rich in alkylated aromatic compound.
    Type: Application
    Filed: December 13, 2011
    Publication date: June 13, 2013
    Inventors: Beth A. Winsett, James I. Arnett, II, Kenwyn M. Leger, Brady A. Compton
  • Publication number: 20130150607
    Abstract: This invention is directed to a new process for making an alkylaromatic compound. In an embodiment of this invention, the process is directed to selective synthesizing an alkylaromatic compound comprising a high amount of dialkylate product. In general, this process involves contacting at least one alkylatable aromatic compound with an alkylating agent and a catalyst under suitable reaction conditions such that the resulting reactor effluent prior to any stripping step may be characterized by a dialkylate product content of at least 44 wt % and a trialkylate and higher polyalkylate product content of no more than 20 wt %. The alkylaromatic compounds produced have excellent thermal and oxidative stabilities, good additive solvency, and improved seal compatibility while maintaining good VI and low temperature properties. They are useful as lubricant basestocks and lubricant additives.
    Type: Application
    Filed: December 7, 2011
    Publication date: June 13, 2013
    Inventor: Beth A. WINSETT
  • Patent number: 8445734
    Abstract: The present invention discloses novel and improved nucleosidic and nucleotidic compounds that are useful in the light-directed synthesis of oligonucleotides, as well as, methods and reagents for their preparation. These compounds are characterized by novel photolabile protective groups that are attached to either the 5?- or the 3?-hydroxyl group of a nucleoside moiety. The photolabile protective group is comprised of a 2-(2-nitrophenyl)-ethyoxycarbonyl skeleton with at least one substituent on the aromatic ring that is either an aryl, an aroyl, a heteroaryl or an alkoxycarbonyl group. The present invention includes the use of the aforementioned compounds in light-directed oligonucleotide synthesis, the respective assembly of nucleic acid microarrays and their application.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: May 21, 2013
    Assignee: NIGU Chemie GmbH
    Inventors: Sigrid Buehler, Markus Ott, Wolfgang Pfleiderer
  • Publication number: 20130041188
    Abstract: The invention relates to a process for purifying crude aromatic nitro compounds which originate from the nitration of aromatic compounds, comprising the following wash stages (a1) and (a2), where each of stages (a1) and (a2) may be performed once or more than once in succession: (a1) contacting the crude aromatic nitro compound (N1-in) with a first aqueous phase (W1-in) comprising at least one base (B) and then separating the phases to obtain an organic phase (N1-res)and an aqueous phase (W1-res); and then (a2) contacting the organic phase (N1-res) obtained in stage (a1) with a second aqueous phase (W2-in) and then separating the phases to obtain a purified organic phase (N2-res) and at least one aqueous phase (W2-res), the aqueous phase used (W2-in) having a pH of 6 to 9.
    Type: Application
    Filed: August 6, 2012
    Publication date: February 14, 2013
    Applicant: BASF SE
    Inventors: Julia Leschinski, Petra Deckert, Leo Denissen, Bart Van De Voorde, Stefan Robert Deibel, Matthias Fankhänel, Samuel Neto
  • Publication number: 20130041189
    Abstract: The invention relates to a process for purifying crude aromatic nitro compounds which originate from the nitration of aromatic compounds, comprising the single or multiple performance of the following wash stage (a): (a) contacting the crude aromatic nitro compound (N-in) with an aqueous phase (W-res) and then separating the phases to obtain an organic phase (N-res) and an aqueous phase (W-res), wherein at least one demulsifier (D) is present in one or more of the wash stages (a).
    Type: Application
    Filed: August 8, 2012
    Publication date: February 14, 2013
    Applicant: BASF SE
    Inventors: Petra DECKERT, Leo Denissen, Bart Van De Voorde, Julia Leschinski, Stefan Robert Deibel, Matthias Fankhänel, Samuel Neto
  • Patent number: 8357827
    Abstract: Nitrobenzene is continuously produced by nitration of benzene with mixed acid under adiabatic conditions. In this process, the pressure upstream of the nitration reactor is from 14 bar to 40 bar above the pressure in the gas phase of the phase separation apparatus used to separate crude nitrobenzene and waste acid.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: January 22, 2013
    Assignee: Bayer MaterialScience AG
    Inventors: Jurgen Munnig, Bernd Pennemann, Andreas Karl Rausch
  • Publication number: 20130018210
    Abstract: A method and apparatus for removing non-aromatic impurities from non-nitrated aromatic reactant in a nitration production process, in which process an aromatic reactant is nitrated (100) to produce a nitrated aromatic product using a molar excess of the aromatic reactant, and non-nitrated aromatic reactant is recovered (102) from the produced nitrated aromatic product and is recycled (104) for use in the nitration production process. A portion of the removed excess non-nitrated aromatic reactant is diverted (106) and subjected to nitration (108). The nitrated stream may be further processed by separating out the spent acids (110) and the non-aromatic impurities (116). These streams may be sent (114, 118) to a suitable location in the nitration production train.
    Type: Application
    Filed: February 17, 2011
    Publication date: January 17, 2013
    Applicant: NORAM INTERNATIONAL LIMITED
    Inventors: Alfred A. Guenkel, Sergio Berretta
  • Patent number: 8343710
    Abstract: Provided is a method that provides both spatial and temporal control of a polymer degradation process using mono- and multifunctional macromolecular monomers (“macromers”) that degrade via single- and multi-photon photolysis mechanisms over a broad range of wavelengths. The macromers can form or be incorporated into networks via covalent, non-covalent and/or ionic interactions. The spatial and temporal degradation of these networks can be controlled. More specifically, provided is a photodegradable macromer, comprising: (a) a photodegradable group; (b) a backbone structure comprising one or more repeating units that may be the same or different, which backbone structure is attached to the photodegradable group directly or through a linker; (c) one or more reactive end groups at one or more ends of the macromer; and optionally, (d) one or more therapeutic agents; and optionally (e) one or more caged groups.
    Type: Grant
    Filed: March 13, 2006
    Date of Patent: January 1, 2013
    Assignee: The Regents of the University of Colorado, A Body Corporate
    Inventors: Kristi S. Anseth, Andrea M. Kasko
  • Publication number: 20120157722
    Abstract: The present invention relates to a process for continuously preparing a mononitrated organic compound, especially a process for preparing mononitrobenzene. The invention relates more particularly to an improved continuous adiabatic process for preparing nitrobenzene.
    Type: Application
    Filed: August 20, 2010
    Publication date: June 21, 2012
    Applicant: BASF SE
    Inventors: Leo Denissen, Eckhard Stroefer, Jan-Dirk Arndt, Torsten Mattke, Kerstin Heinen, Julia Leschinski
  • Publication number: 20120136181
    Abstract: A method of removing alkalinity and salt from a nitroaromatic product downstream of water washing to remove mineral acids and alkaline washing to remove salts of organic acids, comprises washing the product stream with an acidic aqueous solution, prior to the step of removing excess organic reactant, by steam stripping or distillation. Acid removed from the stripper or column is recycled back for use in the acidic washing. The acidic washing is done instead of the neutral washing step of the prior art. It removes residual salt and decreases the level of entrained colloidal water in the nitroaromatic product.
    Type: Application
    Filed: August 18, 2009
    Publication date: May 31, 2012
    Applicant: NORAM INTERNATIONAL LIMITED
    Inventor: Sergio Berretia
  • Patent number: 8183296
    Abstract: The present invention relates to 2,5-di-substituted-4-phenyloxy-substituted-phenyl-amidine derivatives of formula (I) in which the substituents are as in the description, their process of preparation, their use as fungicide or insecticide active agents, particularly in the form of fungicide or insecticide compositions, and methods for the control of phytopathogenic fungi or damaging insects, notably of plants, using these compounds or compositions.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: May 22, 2012
    Assignee: Bayer Cropscience AG
    Inventors: Peter Luemmen, Klaus Kunz, Jörg Greul, Oliver Guth, Benoît Hartmann, Kerstin Ilg, Wahed Ahmed Moradi, Thomas Seitz, Darren Mansfield, Jean-Pierre Vors, Peter Dahmen, Arnd Voerste, Ulrike Wachendorff-Neumann, Marie-Claire Grosjean-Cournoyer, Mark Drewes, Ralf Dunkel, Ronald Ebbert
  • Publication number: 20120115714
    Abstract: The present invention provides the catalyst precursor that has excellent safety and stability, has high stable activity retention rate, can be recycled, increases yield resulted from a reaction, and is easily processed into various forms. The catalyst precursor comprises a structure in which the entire structure is composed of gold or a gold-based alloy and the surface of the structure is modified with elemental sulfur, or at least the surface of the structure is composed of gold or a gold-based alloy and the surface of the structure is modified with elemental sulfur, and a catalytic metal compound supported on the structure, wherein the catalyst precursor has peaks derived from the catalytic metal compound and also sulfur as analyzed by photoelectron spectroscopy, and wherein the peak derived from sulfur is of the sulfur 1s orbital observed within a range of 2470 eV±2 eV in terms of the peak top position.
    Type: Application
    Filed: July 16, 2010
    Publication date: May 10, 2012
    Applicant: FURUYA METAL CO., LTD.
    Inventors: Mitsuhiro Arisawa, Satoshi Shuto, Naoyuki Hoshiya
  • Publication number: 20110245547
    Abstract: An adiabatic process for making mononitrobenzene by the nitration of benzene which minimizes the formation of nitrophenols and dinitrobenzene by-products. The process uses a mixed acid having less than 3 wt % nitric acid, 55 to 80 wt % sulfuric acid, and water. The initial temperature of the mixed acid is in the range of 60 to 96° C. The nitration reaction is complete in about 300 seconds and produces less than 1,200 ppm nitrophenols and less than about 80 ppm dinitrobenzene. The reaction can be carried out in a plug-flow or a stirred pot reactor, or a combination of such reactors.
    Type: Application
    Filed: November 10, 2008
    Publication date: October 6, 2011
    Applicant: NORAM INTERNATIONAL LIMITED
    Inventor: Sergio Berretta
  • Publication number: 20110218368
    Abstract: A method for making mononitrobenzene using a plug flow reactor train. Benzene, nitric acid and sulfuric acid are introduced into the reactor and produced mononitrobenzene is removed at an outlet end. All of the benzene and at least part of the sulfuric acid are introduced at the inlet end of the reactor. A first portion of the nitric acid is introduced by a first nitric acid feed into the inlet end and a second portion of the nitric acid is introduced at one or more additional feeds that are spaced between the inlet end and the outlet end. The method results in reduced formation of by-product dinitrobenzene, improving the reaction yield of mononitrobenzene while avoiding the need for a distillation step.
    Type: Application
    Filed: November 14, 2008
    Publication date: September 8, 2011
    Applicant: NORAM INTERNATIONAL LIMITED
    Inventors: Sergio Berretta, David A. Boyd
  • Publication number: 20110196177
    Abstract: Nitrobenzene is continuously produced by nitration of benzene with mixed acid under adiabatic conditions. In this process, the pressure upstream of the nitration reactor is from 14 bar to 40 bar above the pressure in the gas phase of the phase separation apparatus used to separate crude nitrobenzene and waste acid.
    Type: Application
    Filed: February 2, 2011
    Publication date: August 11, 2011
    Applicant: Bayer MaterialScience AG
    Inventors: Jürgen MÜNNIG, Bernd PENNEMANN, Andreas Karl RAUSCH
  • Publication number: 20110144382
    Abstract: A catalyst comprising a plurality of support nanoparticles and a plurality of catalytic nanoparticles. At least one catalytic nanoparticle is bonded to each support nanoparticle. The catalytic particles have a size and a concentration, wherein a first configuration of the size and the concentration of the catalytic nanoparticles enables a first catalysis result and a second configuration of the size and the concentration of the catalytic nanoparticles enables a second catalysis result, with the first and second configurations having a different size or concentration, and the first and second catalysis results being different. In some embodiments, the first catalysis result is a selective reduction of a first selected functional group without reducing one or more other functional groups, and the second catalysis result is a selective reduction of a second selected functional group without reducing one or more other functional groups.
    Type: Application
    Filed: December 15, 2010
    Publication date: June 16, 2011
    Applicant: SDCMATERIALS, INC.
    Inventors: Qinghua Yin, Xiwang Qi
  • Patent number: 7928270
    Abstract: A process is proposed for distillatively removing dinitrotoluene from process wastewater from the preparation of dinitrotoluene by nitrating toluene with nitrating acid, which comprises basifying the process wastewater to a pH of >8.5, feeding it to a stripping column in the upper region thereof and stripping it with steam in countercurrent to obtain a vapor stream laden with dinitrotoluene and a bottom stream depleted in dinitrotoluene compared to the process wastewater used.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: April 19, 2011
    Assignee: BASF Aktiengesellschaft
    Inventors: Ulrich Penzel, Ruediger Fritz, Holger Allardt, Johannes Adam, Anne-Kathrin Merten
  • Publication number: 20110040092
    Abstract: The invention relates to a process for making HOF.RCN and using it to oxidise organic substrates in a quick and safe way. The process comprises passing diluted fluorine through a conduit and RCN in water through another conduit into a microreactor to form HOF.RCN and reacting this with an organic substrates.
    Type: Application
    Filed: September 5, 2008
    Publication date: February 17, 2011
    Applicant: THE SECRETARY OF STATE FOR DEFENSE
    Inventors: Christopher Murray, Graham Sandford
  • Patent number: 7851661
    Abstract: The present invention provides a process for preparing dinitrotoluene, comprising the steps of a) reacting toluene with nitric acid in the presence of sulphuric acid to give mononitrotoluene, b) separating the reaction product from step a) into an organic phase comprising mononitrotoluene and an aqueous phase comprising sulfuric acid, c) reacting the organic phase comprising mononitrotoluene with nitric acid in the presence of sulphuric acid to give dinitrotoluene, d) separating the reaction product from step c) into an organic phase comprising dinitrotoluene and an aqueous phase comprising sulfuric acid, wherein the reaction product from step a) has a content of toluene of from 3.0 to 8% by weight, based on the organic phase, and a content of nitric acid of from 0.1 to 1.2% by weight, based on the aqueous phase, and the phase separation in step b) is effected in such a way that further reaction of the toluene with the nitric acid is prevented.
    Type: Grant
    Filed: February 2, 2005
    Date of Patent: December 14, 2010
    Assignee: BASF Aktiengesellschaft
    Inventors: Johannes Buettner, Wolfgang Mackenroth, Heinrich Hermann, Peter Konieczny, Juergen Gebauer
  • Publication number: 20100185011
    Abstract: The present invention relates to a process for preparing mixtures of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates by sequential reaction of benzene to nitrobenzene to aniline to polyphenyl polymethylene polyamines to polyphenyl polymethylene polyisocyanates wherein the benzene used as the starting material contains 500 to 5000 ppm w/w toluene and/or xylenes.
    Type: Application
    Filed: April 25, 2008
    Publication date: July 22, 2010
    Applicant: Huntsman International LLC
    Inventors: Robert Carr, Nicolaas Van Wiechen
  • Publication number: 20100093534
    Abstract: The present invention relates to fluoroalkylphenylamidines of the general formula (I), to a process for their preparation, to the use of the amidines according to the invention for controlling unwanted microorganisms and also to a composition for this purpose, comprising the phenoxyamidines according to the invention. Furthermore, the invention relates to a method for controlling unwanted microorganisms by applying the compounds according to the invention to the microorganisms and/or their habitat.
    Type: Application
    Filed: March 8, 2008
    Publication date: April 15, 2010
    Applicant: BAYER CROPSCIENCE AG
    Inventors: Klaus Kunz, Jörg Nico Greul, Ulrich Heinemann, Darren James Mansfield, Amos Mattes, Oswald Ort, Thomas Seitz, Wahed Ahmed Moradi, Ulrike Wachendorff-Neumann, Peter Dahmen, Arnd Voerste
  • Patent number: 7696391
    Abstract: A method for producing nitrobenzene is disclosed which comprises forming a dispersion comprising benzene-containing droplets or particles dispersed in a mixture of concentrated nitric acid and concentrated sulfuric acid, wherein said particles have a mean diameter less than one micron, and subjecting the dispersion to reaction conditions comprising a pressure in the range of about 203 kPa (2 atm) to about 6080 kPa (60 atm) and a temperature in the range of about 20° C. to about 230° C., whereby at least a portion of said benzene is nitrated to form nitrobenzene. A system for carrying out the method is also disclosed.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: April 13, 2010
    Assignee: H R D Corporation
    Inventors: Abbas Hassan, Ebrahim Bagherzadeh, Rayford G. Anthony, Gregory Borsinger, Aziz Hassan
  • Publication number: 20100076230
    Abstract: The invention relates to a continuous process for the manufacture of nitrobenzene. This process comprises the nitration of benzene with nitrating acid that contains at least 3.0 wt. % of nitric acid and at least 67.0 wt. % of sulfuric acid, in a reaction space in which the start temperature of the reaction is above 100.0° C. but below 102.0° C. In addition, this process requires that the benzene and the nitrating acid are dispersed in one another several times.
    Type: Application
    Filed: September 21, 2009
    Publication date: March 25, 2010
    Inventors: Thomas Knauf, Alexandre Racoes, Wolfgang Dohmen, Andreas Rausch
  • Publication number: 20090187051
    Abstract: This invention relates to a process for the continuous preparation of nitrobenzene. This process comprises the adiabatic nitration of benzene with a mixture of sulfuric acid and nitric acid, in which the sum of the concentrations in the reaction zone of the metal ions which form sparingly soluble metal sulfates is less than 900 mg/l, based on the volume of the aqueous phase which contains sulfuric acid.
    Type: Application
    Filed: December 8, 2008
    Publication date: July 23, 2009
    Inventors: Andreas Rausch, Thomas Knauf, Jeffrey Bolton, Alexandre Racoes
  • Publication number: 20090042994
    Abstract: The present invention relates to 2,5-di-substituted-4-phenyloxy-substituted-phenyl-amidine derivatives of formula (I) in which the substituents are as in the description, their process of preparation, their use as fungicide or insecticide active agents, particularly in the form of fungicide or insecticide compositions, and methods for the control of phytopathogenic fungi or damaging insects, notably of plants, using these compounds or compositions.
    Type: Application
    Filed: September 12, 2006
    Publication date: February 12, 2009
    Applicant: Bayer CropScience AG
    Inventors: Peter Luemmen, Klaus Kunz, Jorg Greul, Oliver Guth, Benoit Hartmann, Kerstin Ilg, Wahed Ahmed Moradi, Thomas Seitz, Darren Mansfield, Jean-Pierre Vors, Peter Dahmen, Arnd Voerste, Ulrike Wachendorff-Neumann, Marie-Claire Grosjean-Cournoyer, Mark Drewes, Ralf Dunkel, Ronald Ebbert
  • Publication number: 20090005615
    Abstract: A method for producing nitrobenzene is disclosed which comprises forming a dispersion comprising benzene-containing droplets or particles dispersed in a mixture of concentrated nitric acid and concentrated sulfuric acid, wherein said particles have a mean diameter less than one micron, and subjecting the dispersion to reaction conditions comprising a pressure in the range of about 203 kPa (2 atm) to about 6080 kPa (60 atm) and a temperature in the range of about 20° C. to about 230° C., whereby at least a portion of said benzene is nitrated to form nitrobenzene. A system for carrying out the method is also disclosed.
    Type: Application
    Filed: June 13, 2008
    Publication date: January 1, 2009
    Applicant: H R D CORPORATION
    Inventors: Abbas Hassan, Ebrahim Bagherzadeh, Rayford G. Anthony, Gregory Borsinger, Aziz Hassan
  • Patent number: 7326816
    Abstract: Nitrobenzene is produced and then purified using an acidic wash, an alkaline wash, a neutral wash, subjecting a dispersion formed in the neutral wash to electrophoresis to separate water and benzene from the nitrobenzene and recover purified nitrobenzene.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: February 5, 2008
    Assignee: Bayer MaterialScience AG
    Inventors: Thomas Knauf, Franz-Ulrich Von Gehlen, Jörg Schmiedler, Klaus Pilarczyk, Peter Drinda